Development of Bifunctional Catalysts for CO2 Capture and Conversion at Low Temperatures Under an Electric Field

Abstract

Systems for direct conversion of captured CO₂ into CO (i.e., CO₂ capture and reduction: CCR) via bifunctional catalysts have attracted attention as technologies for achieving carbon neutrality. However, the reported systems require additional heating above 623 K, which is still an issue from an ecological perspective. The present work realized selective CO production through CCR under isothermal conditions at 423 K by the application of a direct current electric field and a Pt-Na/TiO₂ catalyst. The application of an electric field to the catalyst is needed for CO₂ conversion at low temperature, and the loading of both Pt and Na is required for CO₂ capture and its selective reduction to CO. The obtained results open the door for greener CCR technologies that effectively utilize waste heat from power plants and industry.